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    Cannot set timing

    Hi everybody, I'm new to the site and I'm having a problem setting the timing on my 1994 GMC Sierra SLE 5.7L TBI. I've had the truck for about 3 years and when I got it it seemed to be low on power. I changed the plugs, cap, rotor, and wires. 3 of the plugs were fouled really bad. Truck ran...
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